What are the tumor grades and types?

When most normal cells grow old or get damaged, they die, and new cells take their place. Sometimes, this process goes wrong. New cells form when the body doesn't need them, and old or damaged cells don't die as they should. The buildup of extra cells often forms a mass of tissue called a growth or tumor.

Primary brain tumors can be benign or malignant:

Benign brain tumors do not contain cancer cells:

Usually, benign tumors can be removed, and they seldom grow back.

Benign brain tumors usually have an obvious border or edge. Cells from benign tumors rarely invade tissues around them. They don't spread to other parts of the body. However, benign tumors can press on sensitive areas of the brain and cause serious health problems.

Unlike benign tumors in most other parts of the body, benign brain tumors are sometimes life threatening.